18873697 has 2 divisors, whose sum is σ = 18873698. Its totient is φ = 18873696.

The previous prime is 18873691. The next prime is 18873703. The reversal of 18873697 is 79637881.

It is a balanced prime because it is at equal distance from previous prime (18873691) and next prime (18873703).

It can be written as a sum of positive squares in only one way, i.e., 18524416 + 349281 = 4304^2 + 591^2 .

It is a cyclic number.

It is not a de Polignac number, because 18873697 - 2¹⁵ = 18840929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18873697.

It is not a weakly prime, because it can be changed into another prime (18873691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9436848 + 9436849.

It is an arithmetic number, because the mean of its divisors is an integer number (9436849).

Almost surely, 2^18873697 is an apocalyptic number.

It is an amenable number.

18873697 is a deficient number, since it is larger than the sum of its proper divisors (1).

18873697 is an equidigital number, since it uses as much as digits as its factorization.

18873697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 18873697 is about 4344.3868382086. The cubic root of 18873697 is about 266.2475741659.

The spelling of 18873697 in words is "eighteen million, eight hundred seventy-three thousand, six hundred ninety-seven".